MILWAUKEE — The Milwaukee Bucks hit another milestone in the construction of their new arena Monday, erecting the first steel beams for the $500-plus million project.

The arena is part of a larger undertaking that includes a downtown entertainment district and new practice facility costing upwards of $1 billion. With the beams going into the ground on Monday, it keeps the project on track with a target opening date of September 2018.

Mike De Sisti of the Milwaukee Journal Sentinel shared some of the photos via Twitter.

The Wisconsin Entertainment and Sports Center, as it is currently called, has initiated a live stream of the progress on the project, which can be found here. Photos are updated every 15 minutes.

LAS VEGAS — Milwaukee Bucks president Peter Feigin revealed on Sunday that the naming rights for the new arena were down to six or seven legitimate prospects.

Feigin joined Eric Rogers on “The Neighborhood” in an exclusive Zone interview to discuss everything from free agency moves to seating arrangements for the new arena coming to downtown Milwaukee. The current name in place for the arena and entertainment district is the “Wisconsin Sports and Entertainment Center.” Feigin says that’s simply a placeholder which will be replaced once a deal is reached.

The difference between this arena deal and ones around the league is that the Bucks will be selling naming rights to the entire entertainment district as part of the $1 billion-plus project.

Feigin noted that three large Wisconsin-based companies were in contention for naming rights to the arena and entertainment district. While Feigin couldn’t release the names of those companies, a Milwaukee Business Journalarticle from Jan. 2015 shows the largest companies within the state.